Organic production is nowadays more important for the care of the environment. Therefore, fresh horticultural products such as green beans produced with organic compost are healthier and are influenced by their sensory characteristics. The objective of this research was to evaluate the effect of organic compost on the biometric characteristics of fruits and leaves, texture, and sensory attributes of fresh green beans (Phaseolus vulgaris L.), as assessed by consumers. A completely randomized design (CRD) with five experimental treatments with different levels of organic compost was used. The results show the direct influence of the level of organic compost concentration on foliar characteristics, as the concentration of compost increases, its chemical properties are increased. However, there is no direct influence on biometric, firmness, physical-chemical, and color characteristics. The S...

La presente tesis tuvo como Objetivo: Determinar en qué medida influye la concentración de coagulantes cloruro férrico y policloruro de aluminio y sus combinaciones en la remoción de turbidez de los efluentes de una planta de conservas de pescado. Metodología: La eficiencia de la coagulación fue determinada experimentalmente usando un equipo de prueba de jarras, tratando un volumen de 2 L de agua residual a una velocidad de agitación en la coagulación de 120 r.p.m., por un tiempo de 5 min; y en la etapa de floculación se usó una velocidad de 50 r.p.m. en la agitación durante un tiempo de 5 min. Resultados: Cuando se evaluó la eficiencia de los coagulantes FeCl3 y PAC de forma individual y combinada, se mantuvo constante la concentración del floculante de polímero aniónico de alto peso molecular en 60 ppm, siendo las concentraciones óptimas del FeCl3 y del PAC de 2400 ppm ...

Objetivos: determinar los efectos de metales pesados en el cultivo de maíz. Materiales y métodos: Se determinó la concentración de los metales pesados Cu, Pb, Cd, Hg., en las aguas de la cuenca baja del rio Huaura y se evaluó su acumulación y efecto en maíz amarillo duro. También se analizó el contenido del plomo en el suelo extraído con el fin de determinar el efecto residual y la movilidad de estos elementos en el suelo a lo largo del perfil. Las parcelas de maíz se regaron con una solución de plomo con concentraciones de Pb (NO3)2 al 0.005%. Por espacio de dos meses y las del área testigo con agua potable de la Universidad. Se realizó análisis descriptivo de los datos obtenidos, análisis de varianza y comparación de medias empleando la prueba de Duncan para un nivel de probabilidad del 95%. Resultados: las cantidades de plomo se encontraron distribuidas en la raíz, h...

Projections of water availability in the near future are increasingly worrisome due to climate change. It is, therefore, high time to seek and develop technologies that would guarantee water availability in the future. In this respect, desalination of seawater is one of the most important alternatives, as specific attention needs to be directed at improving the existing techniques of it. This is why updating information about new achievements for researchers is so important in improving such technologies. This comprehensive review article analyzes advancements in seawater desalination through a bibliometric study encompassing 8523 scientific papers published from 1966 to 2023. The analysis identifies eight key research areas, highlighting significant improvements in energy efficiency and membrane technology. The review examines innovative approaches, including the application of nanopart...

The Moche River water is contaminated due to informal mining and other anthropogenic activities. The pollutants are primarily organic matter and heavy metals, which contribute to the water’s elevated color and turbidity levels. This contaminated water is used for irrigating surrounding areas, leading to the production of contaminated crops. Monitoring color and turbidity requires expensive instruments. In this study, a water sample was collected from the district of Poroto, located in the province of Trujillo, La Libertad region. Approximately 200 L were sampled, with a pH of 5.2 and a turbidity of 12.04 NTU. The research employs a combined treatment process involving coagulants, specifically ferric sulfate and polyaluminum chloride, followed by filtration through activated carbon. Additionally, a low-cost monitoring system using an Arduino-based turbidimeter and colorimeter is propose...

In the present study, the influence of temperature and activating agents in the production of activated carbon from peach pits was evaluated to determine the most effective removal of water hardness. To obtain experimental data, activation was carried out using a 1:1 ratio of KOH, H3PO4, ZnCl2, and H2SO4 at temperatures of 400°C, 500°C, and 600°C. The results indicate that the highest preparation yield was achieved with carbon activated by H3PO4 at 400°C, resulting in a 47% yield. In all activation cases, the surface acidity, determined by Boehm titration, exceeded the basic character. The predominant acidic character was obtained with ZnCl2 at 500°C, reaching 62.08 mol%; acid character analyses were supported by zero-charge point pH analysis. The best iodine index analysis results were 797.22 mg/g and 747.72 mg/g, obtained with ZnCl2 at 400°C and 600°C, respectively. The activate...

Climate change represents one of the greatest challenges we face globally, and reducing carbon dioxide (CO2) emissions is among the most urgent actions. In this study, we explored an alternative approach using microalgae (Chlorella vulgaris) to capture CO2 from the air, employing an Arduino-controlled biofiltration system with accessible sensors such as the MQ-135 and TESTO 535. We tested different airflow rates (50, 75, and 100 L per hour) and nutrient combinations (N/P ratios of 0, 108.33, and 216.67) to identify the most efficient conditions. Unlike other studies, we integrated real-time monitoring of variables such as CO2 concentration, temperature, and light within a modular, easily adaptable system. The best results were achieved with a flow rate of 100 L/h and an N/P ratio of 216.67, yielding a capture efficiency of 34.88 % and a daily productivity of nearly to 1 g/L. This proposa...